Hi,
I am very new to Network programming. My task is to capture messages from the port of another messenger presently working in our LAN, which is not a Server-Client based.
Presently, it is using port 4000 for messages. I need to develop another application (I'm gonna use Vb.Net) which would be able to communite with this existing Messenger as well as working on its own..

Please suggest some code / methods /ideas, would be really appreciated.

Thanks
Farrukh